Dump Truck Governing Payload and Load Count
Whether the box volume or the legal weight limit fills the truck first, and the load count.
Example
You enter
- Total loose volume to haul (cy) 625
- Heaped box capacity (cy) 12
- Legal payload weight limit (lb) 40000
- Loose material density (lb/cy) 2800
You get
- Weight limited (cy) 14.286
- Governing payload 12
- Truck loads 53
Details, formula, and sources
Weight-limited volume = weight limit / density; payload = min(weight-limited, box); loads = ceil(total / payload). 625 loose cy in 12 cy boxes is 53 loads when the box governs, but haul wet 3,600 lb/cy material and the 40,000 lb limit caps each truck at 11 cy - 57 loads. Weight governs heavy material, volume governs light; pairs with haul-cycle production.
weight_limited_cy = weight_limit_lb / material_density_lb_per_lcy; payload_cy = min(weight_limited_cy, box_vol_cy); loads = ceil(total_lcy / payload_cy).
Governing-payload identity by name (weight-limited volume vs box; loads from total / payload); first-principles min-constraint arithmetic.
The governing-payload logic is public first-principles arithmetic; the box capacity and legal payload come from the truck and the axle/GVW limits.
Estimate. AHJ and licensed professional govern.
Field names used by the API: total_lcy, box_vol_cy, weight_limit_lb, material_density_lb_per_lcy, weight_limited_cy, payload_cy, loads
- Box capacity heaped box volume from the truck (~12 cy default)truck manufacturer
- Legal payload weight limit from the axle and GVW limits (~40,000 lb default); the axle limits govern the weightaxle / GVW limits